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threshold 1
what are Fossils
RockFord
iowa 375,000,000 years ago
how do we know
threshold 2
What is a Glacier
Ice Age basics/ice animals
Evidence of glaciers in Iowa
Timeline and Background
Late Pleistocene Landscapes
Iowa Family Finds Mammoth Bones in Backyard
Stories of Iowa
Iowa’s Landscapes
Glaciers
NEW ADDITION
threshold 3
landscape
people
how do we know?
threrhold 4
iowa 170 years ago
iowa's history
how do we know?
Glaciers